PengembanganVariasi Desain Berbasis Artistic Computer Aided Manufacturing (ArtCam) dan Rapid Prototyping (RP) untuk Meningkatkan Daya Saing Souvenir

The purpose of this study was to improve product design variations artistic brass souvenirs through of technology Rapid Prototyping (RP) to create the master mold brass products so as to increase the competitiveness of the product in the eyes of consumers. Market research will be conducted to identify consumer buying interest and identify distinguishing excellence needed to build the concept of product development brass. The research results in the form of a distinctive design trades selected areas further using software designed Artistic Computer Aided Manufacturing (ArtCAM) and translated into a master mold by a 3D engine utilizing Object 30Pro RP technology. This research will be focused on optimizing the manufacturing process so that the brass souvenirs is expected to appear as a continuous improvement effort to improve the competitiveness of the industrial centers Ngawen souvenirs

Monitoring and Analysis of Environmental Gamma Dose Rate around Serpong Nuclear Complex

An environmental radiation monitoring system that continuously measures gamma dose rate around nuclear facilities is an important tool to present dose rate information to the public or authorities for radiological protection during both normal operation and radiological accidents. We have developed such a system that consists of six GM-based device for monitoring the environmental dose rate around Serpong Nuclear Complex. It has operated since 2010. In this study, a description of the system and analysis of measured data are presented. Analysis of the data for the last five years shows that the average dose rate levels were between 84-99 nSv/h which are still lower than terrestrial gamma radiation levels at several other locations in Indonesia. Time series analysis of the monitoring data demonstrates a good agreement between an increase in environmental gamma dose rate and the presence of iodine and argon in the air by in situ measurement. This result indicates that system is also effective for an early warning system in the case of radiological emergency

Pengaruh Tinggi Lepasan Efektif terhadap Dispersi Atmosferik Zat Radioaktif (Studi Kasus: Calon Tapak Pltn Bangka Belitung)

EFFECT OF EFFECTIVE RELEASE HEIGHT ON ATMOSPHERIC DISPERSION OFRADIOACTIVE MATERIAL (CASE STUDY: CANDIDATE SITES FOR NPP IN BANGKABELITUNG). Nuclear is an alternative energy resource that can be considered in the context ofenergy mix. Preliminary studies was carried out on nuclear power plant site in West Bangka andSouth Bangka, Bangka Belitung. One of the important aspects in construction of nuclear power plantsis radiological impact on society due to atmospheric releases of radioactive substances. This study examines the effect of effective release height on dispersion pattern of radioactive substances with Gaussian Plume Model using PC-CREAM 08. From calculation results, the dispersion of radioactivesubstances at each site has different patterns due to the frequency distribution of wind direction, windspeed and atmospheric stability. In this study, atmospheric stability was determined using SolarRadiation Delta Temperature method. Spatial distribution of radioactive substances in variousaltitude on the same site has similar tendency, but lower effective release height causes highermaximum concentration of radioactive substances. Dispersion pattern of radioactive substances oneach site was influenced by the frequency distribution of wind direction and speed. Nevertheless, thedominant wind direction at the site of West and South Bangka Bangka blows a similar direction, i.efrom the ESE to the WNW. Concentration of radioactive substances in the air both in the West andSouth Bangka Bangka far below the standard level of radioactivity was determined by regulatorybody. This indicates that the effects of atmospheric dispersion of nuclear power plants in BangkaBelitung was no significant on environment and public safety. For better represent of radiologicalimpact, it is necessary to estimate individual doses of public members

Evaluasi Cepat Struktur Portal Beton Bertulang terhadap Gempa

Earthquakes from 2004 to 2009 in Indonesia has resulted in many deaths and the collapse of the building. The American Society of Civil Engineers (ASCE) with the Federal Emergency Management Agency (FEMA) has published FEMA 310 as a handbook for seismic evaluation of buildings. FEMA 310 evaluation includes evaluation of phase one, two and three. Evaluation of phase one (tier 1) using a checklist of structural, non-structural, region of low sismicity and also geologic site hazard and foundation. Evaluation of the second phase (tier 2) is a linear analysis for structures such as static equivalence analysis and dynamic. Evaluation of the third stage (tier 3) is non- linear analysis of such a pushover. If the evaluation phase of the assessment does not meet the criteria, then it should proceed to the second phase, as well as for further evaluation. The building is located in the city of Pekanbaru that is reviewed and evaluated up to the second phase. Calculation of seismic shear force have used seismic hazard map of Indonesia has been published in 2010. This is one step to improve the performance of structures to resist earthquakes, it is expected that this will reduce structural damage and avoid loss of life. The results of the evaluation phase one (tier 1) that has been conducted shows that the buildings that were reviewed non- compliant for weak story and soft story. Evaluation of the second phase (tier 2) shows that all the columns in buildings were able to bear the load, while some beam were over strength, however both of building can be declared the buildings are safe against earthquakes (compliant)

Monitoring and Analysis of Environmental Gamma Dose Rate Around Serpong Nuclear Complex

An environmental radiation monitoring system that continuously measures gamma dose rate around nuclear facilities is an important tool to present dose rate information to the public or authorities for radiological protection during both normal operation and radiological accidents. We have developed such a system that consists of six GM-based device for monitoring the environmental dose rate around Serpong Nuclear Complex. It has operated since 2010. In this study, a description of the system and analysis of measured data are presented. Analysis of the data for the last five years shows that the average dose rate levels were between 84-99 nSv/h which are still lower than terrestrial gamma radiation levels at several other locations in Indonesia. Time series analysis of the monitoring data demonstrates a good agreement between an increase in environmental gamma dose rate and the presence of iodine and argon in the air by in situ measurement. This result indicates that system is also effective for an early warning system in the case of radiological emergency

Morphological, Thermal and Oxygen Barrier Properties Plasticized Film Polylactic Acid

Introducing plasticizer poly(ethylene glycol) (PEG400) was applied into poly(lactic acid) (PLA) to produce film matrix packaging by direct casting. Non mechanical properties were carried out plasticized PLA including morphology, crystallinity structure and degree, thermal properties and oxygen barrier properties. Plasticized PLA revealed improving surface structure of PLA film matrix form fractures and homogenous film were achieved at 5% PEG 400. Chromatogram PLA and plasticized PLA were categorized crystal structure an α-form crystal. Intercalated and exfoliated structure did not occur significantly due to dispersion PEG 400 in the matrix but indicated dispersion structure. Thermal properties did not improve plasticized PLA significantly for both glass temperature and melting temperature. PEG 400 accelerated crystal formation that increased the crystallinity degree from 17.71% to 34.64%. Plasticized PLA enhanced permeability value about 20% while largest fraction PEG400 reduced ability to prevent from oxygen through pass the film. The oxygen barrier properties was significantly affected degree of crystalline in the film with a correlation number 0.85